﻿using System;

namespace _0419
{
    class Program
    {
        //图形类：
        //求周长，面积（三角形， 四边形， 圆形）

        static void Main(string[] args)
        {
            tuxing t = new tuxing();
            s s1 = new s();
            s1.b1 = 3;
            s1.b2 = 4;
            s1.b3 = 5;
            s1.Mian = 18;
            s1.sj();
            si s2 = new si();
            s2.c = 6;
            s2.k = 3;
            s2.sb();
            y y1 = new y();
            y1.r = 15;
            y1.yx();
        }
    }
}
